(19)
(11) EP 0 514 632 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
27.01.1993 Bulletin 1993/04

(43) Date of publication A2:
25.11.1992 Bulletin 1992/48

(21) Application number: 92103869.1

(22) Date of filing: 06.03.1992
(51) International Patent Classification (IPC)5: B41J 2/165
(84) Designated Contracting States:
AT BE CH DE DK ES FR GB GR IT LI LU NL PT SE

(30) Priority: 08.03.1991 JP 43666/91
08.03.1991 JP 43667/91

(71) Applicant: CANON KABUSHIKI KAISHA
Tokyo (JP)

(72) Inventors:
  • Karita, Seiichiro, c/o Canon Kabushiki Kaisha
    Ohta-ku, Tokyo 146 (JP)
  • Ohkuma, Norio, c/o Canon Kabushiki Kaisha
    Ohta-ku, Tokyo 146 (JP)
  • Saito, Megumi, c/o Canon Kabushiki Kaisha
    Ohta-ku, Tokyo 146 (JP)
  • Higuma, Masahiko, c/o Canon Kabushiki Kaisha
    Ohta-ku, Tokyo 146 (JP)
  • Arashima, Teruo, c/o Canon Kabushiki Kaisha
    Ohta-ku, Tokyo 146 (JP)

(74) Representative: Tiedtke, Harro, Dipl.-Ing. 
Patentanwaltsbüro Tiedtke-Bühling-Kinne & Partner Bavariaring 4
80336 München
80336 München (DE)


(56) References cited: : 
   
       


    (54) Ink jet recording head and method for preserving same


    (57) A recording head comprises an ink container (IJC), an energy generating device (91) for discharging ink from the ink container, an ink discharge section corresponding to the energy generating device and a covering member that covers the ink discharge section and an atmosphere-communicating opening for the ink container, wherein when the recording head is out of recording, a small opening communicating with the atmosphere-communicating opening, or a valve member (22) capable of opening or closing in accordance with an internal pressure change, or an internal pressure change-absorbing member capable of absorbing an internal pressure change by changing its volume is provided on said covering member at a position corresponding to the atmosphere-communicating opening.






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